<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
    

    </style>
</head>

<body>  
    <div id="app">

   
    <p >{{msg}}</p>
    <input type="text" :name="msg">
  
  </div>
    <script src="https://cdn.jsdelivr.net/npm/vue@2.6.13/dist/vue.js"></script>
    <script>
       var vm=new Vue({
           el:'#app',
           data:{
               msg:'我是'
           }
       })


    </script>
</body>

</html>